Method of forming brushes.



A. B, WI'ENSJ METHOD OF FORMING BRUSHES. APPucAnoN rm AUG-I2, {91s.

Wafer/2? Patented Mar. 19,1918.

s. e um onion.

ADOLPH E. I s, 01 DULUTH, MINNESOTA, ASSIGNOR 0F ONE-THIRD 'I'O ARTHUR A.

PLEYTE, OF S ATESAN, DULUTH, 1 510mg WISCONSIN, AND ONE-THIRD T0 SARAH M. WIENS, OF

THOD 0F FORMING BRUSHES.

rescuer.

Specification of Etette'rs Patent.

Patented Mar. 119, 11938.

Application filed August 12, 1916. Serial No. 114,492.

To all 'wl'wm it may concern.

Be it known that ii, Anonrn R. WIEN's, a citizen of the United States, and resident or Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Methods of Forming Brushes; and 1 do hereby declare that the following is a full, clear, and exact description thereof.

The present invention relates to new and useful improvements in brushes and the method of forming said brushes.

it is in general the object of the invention to simplify and otherwise improve the structure of brushes in general and it is more particularly an object to provide a brush structure which maybe formed with a minimum amount of labor whereby the cost of manufacture of such brushes may be materially reduced.

it is a further and more detailed object to provide a brush structure wherein the body of Stock is held in a manner permitting a. maximum flexibility thereof, so that brushes so constructed may afford a maximum amount of wear.

With the above and other objects and advantages in view, the invention resides more particularly in the novel combination, arrangement and formation of parts more particularly hereinafter described and particularly pointed out the appended claim.

the drawings Figure 1 is a side'elevational view of a brush constructed in accordance with the present invention.

Fig. 2 is a butt end-view or the brush.

Fig. 3 is a diagrammatic view showing the method of associating the brush stock with the strip of adhesive tape which forms the head of the brush.

Referring now more particularly. to-the accompanying drawings, the essential structure of my improved brush resides in the disposition of the butt ends of the brush stock 5 between the convolutions of a spirally coiled strip of non-extensible material 6, which preferably comprises rubber coated tape whereby the adhesive nature of the ru er firm y grips the end of the stock.-

As shown in Fig. 1, the ends of the stock terminate short of the outer side of the strip and thus a minimum length of the stock is confined within the head which is formed by the spirally coiled strip.

Fig. 3 illustrates more particularly the preferred method of associating the stock. with the strip, wherein the stock is fed to the strip from a suitable feeding member 7 at the juncture of the spirally coiled portion of the strip with the portion being coiled, the feeding of the stock and the coiling of the strip being preferably effected simultaneously.

During the coiling operation, the strip 6 is placed under considerable tension, to impart a desired firmness to the head, and due to this tension as the strip is coiled, the strands are embedded in the rubber coating of the strip to thus insure their proper holding engagement thereby.

Although a head of circular shape is shown in the drawings it is apparent that the head may be also formed of any oblong shape by coiling the strip about an oblong core portion. lhus the desired general shape of the brush is procured, and upon the coiling operation being completed, the brush head thus formed is pressed within a suitable mold and pressed to a desired final shape, a suitable compression of the head at this time being also procured if desired.

The final step is to then vulcanize the head, whereby the stock and the convolutions of the tape are formed into a homogeneous body.

From the foregoing it will be seen that an exceedingly simple brush structure has been procured which provides for an indefinitely permanent holding of the stock, as the rubber which comprises the major portion of the head, does not expand or contract and is impervious to chemical action of liquids. It will be noted that the engagement of the body of the stock terminates positively at the edges of the strip and thus a maximum flexibility of the stock is procured in contradistinction particularly to that type of brush wherein the I 5 mm the said body of stockrubber body for holding the stock is drawn vulcanizing the consequent head formed by by'capfllary'attraction into the butt portion the coiled rubber-coated tape. of thebody of stock,- and thus necessarily In testimony that -I claim the foregoing roJects .m a somewhat irregular manner I have hereunto set my hand at Duluth, in 15 the county of St. Louis and State oi Minne- ITfilaJm h d f f brush hich sota, in the presence of two witnesses.

emeo-o ormmga w consists infeedi'ng the butt ends of brush w-tnesses, ADOLPH WIENS' stock on to a strip of adhesive rubber-eoated 1 10 non-elastic tape and simultaneously spirally PAUL Tnomson,

coiling said strip under tension, and then Gsonon R. WIENS. 

